Question 353103
{{{x <= 3}}} is the area to the left of the vertical line at {{{x = 3}}} and
also including the line itself.
If you shaded that area, then you would shade the area above
the line {{{x + y = 7}}}, and that would be {{{x + y >7}}}, which is
{{{y >-x + 7}}}
Where those 2 areas intersect is  the answer
Graphing:
 {{{ graph( 400, 400, -10, 10, -10, 10, -x + 7) }}}